Help: Juki SC-120 motor running slow / jerky?
Has anyone successfully replaced a capacitor on an SC-120, or is it time to buy a replacement unit? Any advice before I call a tech would be appreciated. Thanks!
I have a Juki industrial machine with an SC-120 control box. Recently, the motor has been running erratically—sometimes slow to start, other times jerky at low speed.
Message with any questions.
Control box only (no motor or pedal). 110V version.
Selling a genuine Juki SC-120 AC servo motor control box. This was pulled from a working DDL-8700 industrial sewing machine that was upgraded to a newer unit.
Good working condition. All functions tested: needle positioning works, speed is smooth across the full range, and the cooling fan runs quietly. Some cosmetic scuffs on the housing (see photos), but nothing affecting performance. juki sc-120
Juki SC-120 Review: A Reliable Workhorse for Industrial Machines
Juki SC-120 Electronic Control Box – Works Perfectly
$[Insert price]
Here’s a proper post suitable for a forum, social media group (like a sewing or industrial machine community), or a classified ad, depending on your goal.
Many Juki industrial machines using a 400W clutch or servo motor conversion.
If you own a Juki industrial sewing machine, you know that the motor and control box are just as important as the head itself. The Juki SC-120 is a common electronic control box (often paired with the DDL-8700 or similar models) that delivers consistent, quiet power. Help: Juki SC-120 motor running slow / jerky
